The
Coastal Mountain Range, also known as the
Hai'an Range , is a mountain range situated on the eastern coast of the island of
Taiwan, and spans the border between
Hualien and
Taitung Counties. Coastal Mountain Range is part of the
Philippine Mobile Belt which was formed over 400 million years ago by the collision and compression of Philippine Mobile Belt and
Eurasian Plate. The geological structure is composed of soft sediments which have weaker anti-erosion property and are vulnerable to wind.